By Topic

Microwave Theory and Techniques, IRE Transactions on

Issue 3 • Date May 1961

Filter Results

Displaying Results 1 - 23 of 23
  • [Front cover - May 1961 [T-MTT]]

    Publication Year: 1961, Page(s):f1 - f2
    Request permission for commercial reuse | PDF file iconPDF (124 KB)
    Freely Available from IEEE
  • Table of contents (May 1961 [T-MTT])

    Publication Year: 1961, Page(s): 211
    Request permission for commercial reuse | PDF file iconPDF (63 KB)
    Freely Available from IEEE
  • Octave-Bandwidth UHF/L-Band Circulator

    Publication Year: 1961, Page(s):212 - 216
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    Test data are presented on two aluminum-substituted yttrium-iron-garnet (YIG) materials that have low-saturation magnetizations that permit the extension of ferrite devices well into the UHF/VHF region. In particular, one composition has a saturation magnetization of 300 gauss and a line width of 50 oersteds. Measurements are presented that compare the new materials with previously available highe... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Five-Port Matched Pseudo-Magic Tee

    Publication Year: 1961, Page(s):216 - 219
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    The five-port matched pseudo-magic tee consists of an input waveguide, two load arm waveguides which are coupled into the input waveguide with +90° and -90° phase shifts, respectively, and an output waveguide which is split into two load waveguides by a septum. The improvements include a much broader matching and isolation bandwidth, higher isolation between arms, better matching into ar... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Theory of Dielectric-Loaded and Tapered-Field Ferrite Devices

    Publication Year: 1961, Page(s):220 - 224
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    Loading a ferrite resonance isolator or differential phase shifter with a dielectric or biasing the ferrite with an inhomogeneous dc magnetic field are very useful ways of improving the performance of these ferrite devices. Whereas these methods are very commonly used in transverse-field ferrite devices, no extensive analytical treatment of the subject has appeared in the literature. It is the pur... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Theory of TEM Diode Switching

    Publication Year: 1961, Page(s):224 - 238
    Cited by:  Papers (24)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1480 KB)

    The theory of TEM diode switching is presented for purpose of understanding and designing TEM microwave diode switches. A few experimental results are reported for the purpose of supporting the theory and demonstrating the exceptional bandwidth possible. An analysis is given of the switching action of one and of two or more diodes as well as the biasing of the center conductor of a TEM transmissio... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Measurement of Small Dielectric Losses in Material with a Large Dielectric Constant at Microwave Frequencies

    Publication Year: 1961, Page(s):239 - 242
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (391 KB)

    A method is described for measuring dielectric losses at microwave frequencies in materials with a large dielectric constant. By observing a dielectric resonance in a sufficiently large sample, the loss tangent of the material can be obtained. Results on SrTiO3, single crystals at 20 kMc are presented. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the Existence of Leaky Waves Due to a Line Source Above a Grounded Dielectric Slab

    Publication Year: 1961, Page(s):243 - 247
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (562 KB)

    The existence of a particular type of leaky wave is verified experimentally. The leaky wave considered is that due to an electric line source above a dielectric slab. Since such a leaky wave cannot exist by itself, it must be detected in the presence of the remainder of the continuous spectrum and often in the presence of a surface wave (or waves). This was done by probing the fields and observing... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Broad-Band Glass-to-Metal Coaxial Vacuum Seal

    Publication Year: 1961, Page(s):248 - 251
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (361 KB)

    The design procedure for a broad-band glass-to-metal seal is described, and experimental-results are presented for a structure examined over the frequency range of 100 to 11,000 Mc. The seal described is capable of operating at bakeout temperatures as high as 450°C, with higher temperatures being attainable by the use of other materials. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Magnetically-Tunable Microwave Filters Using Single-Crystal Yttrium-Iron-Garnet Resonators

    Publication Year: 1961, Page(s):252 - 260
    Cited by:  Papers (38)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (957 KB)

    A new type of magnetically-tunable band-pass microwave filter that makes use of ferromagnetic resonance in single-crystal yttrium iron garnet is presented. The 3-db bandwidth can be adjusted from about 6 Mc to 100 Mc at X-band, and the center frequency can be tuned over a wide range of frequencies, by means of a varying dc field. A theoretical analysis of the operation and behavior of this type of... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Linear Tapers in Rectangular Waveguides (Correspondence)

    Publication Year: 1961, Page(s): 261
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (104 KB)

    Recently, the special case of a linear double taper in rectangular Waveguide propagating the TE10 mode in vacuum dielectric was examined. Approximate expressions for the reflection coefficient and voltage standing-wave ratio as functions of the taper dimensions and free space wave-length were derived and experimentally verified. This correspondence generalizes the equations to be applic... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Unloaded Q of a YIG Resonator from X-Band to 4 Millimeters (Correspondence)

    Publication Year: 1961, Page(s):261 - 262
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (281 KB)

    Carter and Flamrner have reported measurements at lower microwave frequencies of Qu, the unloaded Q of a single crystal YIG sphere treated as a resonator. In their paper a comparison of the measured and theoretical Qu, the latter computed on the basis of a constant relaxation time, yielded good agreement only in the 2-5 kMc range. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Z0 of Rectangular Coax (Correspondence)

    Publication Year: 1961, Page(s):262 - 263
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (321 KB)

    The characteristic impedance Z0 of rectangular coax has long been the subject of experimental and theoretical investigations. The problem is to obtain an expression for Z0 which is both simple and precise to facilitate device design. The recent works of Chen and Cohn are summarized in Fig. 1 and compared with simple and precise calculations already known. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Easy Method of Matching Microstrip Loads and Attenuators (Correspondence)

    Publication Year: 1961, Page(s): 263
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    This note describes a novel method of matching microstrip loads which gives good performance without critical adjustment and is particularly useful when the lossy material has to be chosen for mechanical reasons rather than optimum characteristic impedance. In the present instance, the method was applied to the design of clip-on sliding loads for measurement purposes and to highly stable calibrate... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Empirical Design Method for Multisection Ridge-Guide Transducers of Large-Impedance Transformation (Correspondence)

    Publication Year: 1961, Page(s):263 - 266
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (465 KB)

    The available analytical design procedures are inadequate for the design of broad-band ridge-guide transducers of large transformation ratio. Various authors have discussed the problem of obtaining maximum bandwidth with multisection quarter-wave transformers, and recently Young has extended the treatment to include inhomogeneous transformers where frequency dispersion varies from section to secti... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pulse-Operated Circulator Switch (Correspondence)

    Publication Year: 1961, Page(s): 266
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    One of the major disadvantages of employing a ferrite circulator as a microwave switch is the holding current required to maintain the circulator in the switched position. One solution to this problem, reported by Levey and Silber, is the utilization of ferrite tubes as the differential phase shift element in a circulator. Switching is accomplished with a single pulse of current which reverses the... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Polishing Technique for Garnet Spheres (Correspondence)

    Publication Year: 1961, Page(s):266 - 267
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (382 KB)

    A new technique using a motor-driven polishing head intended primarily for the final stages of polishing yttrium-iron-garnet spheres has been developed. This method has produced several fractional oersted line-width crystals including a matched pair of 0.060-inch diameter spheres ground simultaneously. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Miniaturized, Temperature Stable, Coaxial Y-Junction Circulators (Correspondence)

    Publication Year: 1961, Page(s):267 - 269
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (510 KB)

    The problem of designing a circulator that is extremely small, durable, and lightweight immediately suggests the Y- or T-junction approach. For use with coaxial connectors, the strip transmission line Y-junction suggested by Auld and subsequently demonstrated by Milano, Davis and Saunders, has obvious advantages. A systematic approach to developing such a device calls for the symmetrical alteratio... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • K-Band Reciprocal Ferrite Phase Modulator (Correspondence)

    Publication Year: 1961, Page(s):269 - 270
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (342 KB)

    A rectangular waveguide reciprocal phase modulator, making use of a longitudinal magnetic control field, was reported by Reggia and Spencer in 1957. This X-band phase modulator consisted of a longitudinally magnetized ferrite rod centrally located inside a rectangular wavegrride excited in its fundamental TE01 mode. The outstanding advantages of this type modulator are the large phase s... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ka-Band Ferrite Phase Shifter (Correspondence)

    Publication Year: 1961, Page(s): 271
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (154 KB)

    In 1957, Reggia and Spencer utilized a new technique to develop a phase shifter at 9.1 kMc. This letter reports an extension of their technique to Ka-band frequencies. A maximum figure of merit of 1100 degrees of phase shift per db of loss has been achieved at 35 kMc +- 500 Mc. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Low-Temperature Microwave Power Limiter (Correspondence)

    Publication Year: 1961, Page(s):272 - 273
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (257 KB)

    A passive microwave power limiter, using the nonlinear properties of ferromagnetic resonance in yttrium-iron-garnet (YIG) has been evaluated at 4.2° K, 77° K, and 297° K. The limiter, of the DeGrasse type, consists of two decoupled, half-wavelength coaxial cavities as shown schematically in Fig. 1. Input and output coupling is made through the use of quarter-wavelength matching tran... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New Coaxial-to-Stripline Transformers Using Rectangular Lines (Correspondence)

    Publication Year: 1961, Page(s):273 - 274
    Cited by:  Papers (2)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (191 KB)

    The most common form of coaxial-to-stripline transition consists of a simple inline butt joint, as described by Barrett. A typical transition between a 50-ohm high-Q triplate and a standard N-type connector is shown in Fig. 1. This gives a VSWR<1.15 at frequencies up to 7000 Mc deteriorating to 1.25 at higher frequencies up to 11,000 Mc. While these results are acceptable for many types of stri... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Contributors

    Publication Year: 1961, Page(s):275 - 276
    Request permission for commercial reuse | PDF file iconPDF (494 KB)
    Freely Available from IEEE

Aims & Scope

This Transactions ceased publication in 1962. The current retitled publication is IEEE Transactions on Microwave Theory and Techniques.

Full Aims & Scope